86 lines
2.6 KiB
Rust
86 lines
2.6 KiB
Rust
use std::{sync::Arc, ops::Deref};
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use futures::StreamExt;
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use http::StatusCode;
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use http_digest_headers::{DigestHeader, DigestMethod};
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use reqwest::Body;
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use serde::Serialize;
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use sigh::{PrivateKey, SigningConfig, alg::RsaSha256};
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#[derive(Debug, thiserror::Error)]
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pub enum SendError {
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#[error("HTTP Digest generation error")]
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Digest,
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#[error("JSON encoding error")]
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Json(#[from] serde_json::Error),
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#[error("Signature error")]
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Signature(#[from] sigh::Error),
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#[error("HTTP request error")]
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HttpReq(#[from] http::Error),
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#[error("HTTP client error")]
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Http(#[from] reqwest::Error),
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#[error("Invalid URI")]
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InvalidUri,
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#[error("Error response from remote")]
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Response(String),
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}
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pub async fn send<T: Serialize>(
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client: &reqwest::Client,
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uri: &str,
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key_id: &str,
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private_key: &PrivateKey,
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body: &T,
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) -> Result<(), SendError> {
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let body = Arc::new(
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serde_json::to_vec(body)
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.map_err(SendError::Json)?
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);
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send_raw(client, uri, key_id, private_key, body).await
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}
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pub async fn send_raw(
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client: &reqwest::Client,
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uri: &str,
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key_id: &str,
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private_key: &PrivateKey,
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body: Arc<Vec<u8>>,
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) -> Result<(), SendError> {
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let mut digest_header = DigestHeader::new()
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.with_method(DigestMethod::SHA256, &body)
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.map(|h| format!("{}", h))
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.map_err(|_| SendError::Digest)?;
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if digest_header.starts_with("sha-") {
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digest_header.replace_range(..4, "SHA-");
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}
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// mastodon uses base64::alphabet::STANDARD, not base64::alphabet::URL_SAFE
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digest_header.replace_range(
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7..,
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&digest_header[7..].replace("-", "+").replace("_", "/")
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);
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let url = reqwest::Url::parse(uri)
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.map_err(|_| SendError::InvalidUri)?;
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let mut req = http::Request::builder()
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.method("POST")
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.uri(uri)
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.header("host", format!("{}", url.host().ok_or(SendError::InvalidUri)?))
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.header("content-type", "application/activity+json")
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.header("date", chrono::Utc::now().to_rfc2822()
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.replace("+0000", "GMT"))
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.header("digest", digest_header)
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.body(body.as_ref().clone())
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.map_err(SendError::HttpReq)?;
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SigningConfig::new(RsaSha256, &private_key, key_id)
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.sign(&mut req)?;
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let req: reqwest::Request = req.try_into()?;
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let res = client.execute(req)
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.await?;
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if res.status() >= StatusCode::OK && res.status() < StatusCode::MULTIPLE_CHOICES {
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Ok(())
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} else {
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let response = res.text().await?;
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Err(SendError::Response(response))
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}
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}
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